Mining is a process of extraction of
minerals from mines. Using various techniques and machines mines are
quarried in order to recover various types of minerals like iron, coal,
copper, mica, etc. which are further used in various industries.
Minerals after being quarried consist of various types of ferrous and
non ferrous contaminants. These contaminants are removed from the
minerals in order to recover fine quality pure minerals.
Devices that are popularly used for removing ferrous contaminants from
the minerals are various types of magnetic separators. Following are the
magnetic separators that are used widely in mineral and mining industry:
Wet Drum Separators
Wet drum separators are widely used magnetic separators used in mineral
industries especially in coal mines. They are infact used to recover
ferro silicon or other magnetic fines in dense media plants. They
enhance both the plant productivity and product purity by removing
contaminants. Wet drum separators can even remove very fine and weak
contaminants even from dense materials. Due to this they are useful in
those applications where product purity is given prime importance.
Drum Magnets
Drum magnets are used for removing ferrous contaminants from a wide
range of free-flowing bulk and granular materials in high-volume
applications. Minerals like coals, mica etc consist of many other
ferrous and non ferrous fine. These ferrous fines are captured by the
the magnetic assembly which is inside the unit's shell. After the
contaminants are removed, the cleaned product falls freely to a
discharge point. There is a cleat that sweeps the ferrous debris through
and out of the magnetic field.
Over Band Magnetic
Separator
Overband magnetic separators are quite similar to the suspended magnets
which are fabricated and configured to trap and hold the tramp metal
from the product carried by the conveyor. The magnets that are used in
these types of separators are either ceramic or powerful rare earth
magnets.
Overband magnetic separators are housed in stainless steel structure.
They can be installed either above or below the passage of material
flow. Due to their versatility and productivity , they are utilized in
various mining and mineral industry.
Suspended Plate Magnets
In suspended plate magnets, from free flowing granular products
metallic contaminants usually tramp iron are pulled up. The contaminants
are collected on the self cleaning magnetic separator belt which are
discharged through hopper. The occasional tramp iron materials are
removed by suspended magnets from conveyor belt, vibratory feeder or
gravity chute.
